/*
 * Copyright (c) 2009, James Leigh All rights reserved.
 * Copyright (c) 2011 Talis Inc., Some rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution. 
 * - Neither the name of the openrdf.org nor the names of its contributors may
 *   be used to endorse or promote products derived from this software without
 *   specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
package org.callimachusproject.fluid.producers;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.channels.ReadableByteChannel;
import java.nio.charset.Charset;

import org.callimachusproject.fluid.FluidBuilder;
import org.callimachusproject.fluid.FluidType;
import org.callimachusproject.fluid.Producer;

/**
 * Converts an InputStream into byte[].
 */
public class ByteArrayMessageReader implements Producer {
	private ByteArrayStreamMessageReader delegate = new ByteArrayStreamMessageReader();

	public boolean isProducable(FluidType ftype, FluidBuilder builder) {
		Class<?> type = ftype.asClass();
		if (!type.isArray() || !Byte.TYPE.equals(type.getComponentType()))
			return false;
		Class<?> t = ByteArrayOutputStream.class;
		return delegate.isProducable(ftype.as(t), builder);
	}

	public Object produce(FluidType ftype, ReadableByteChannel in, Charset charset,
			String base, FluidBuilder builder) throws IOException {
		ByteArrayOutputStream stream = delegate.produce(ftype, in, charset, base, builder);
		if (stream == null)
			return null;
		return stream.toByteArray();
	}
}
